Vidéo d'introduction

Introduction

This year’s iteration of the Apple Watch can be your trainer, doctor, guardian, and now, live-in nurse! How’d Apple fit all these personalities into one watch? Let’s find out why everyone is falling so hard for this watch—with a teardown!

If you can’t get enough repair and teardown content, we have just the prescription for you: two to three Instagrams a day, Facebook during lunch, a newsletter once a week, and a tweet when the craving is too much.

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With the screen in isolation, we get a better look at the contours of the new display. The extra pixels and increased screen-to-body ratio come thanks to rounded-off corners, a la iPhone X, XS, and XS Max.

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Next up, we surgically remove the new noisemaker—that's alleged to be 50% louder, and maybe harder, better, faster?

Now that the microphone has migrated over near the digital crown, the speaker can take advantage of that space for more volume.

A silicone gasket seals the speaker to make its water-expelling magic possible, much like it did on last year's version.

The little black “eye” adjoining the speaker may be a barometric sensor, cleverly using the speaker grille’s access to the outside atmosphere. Since it no longer needs its own unsightly hole in the chassis as it did in Series 3, this is a victory for Jony Ives everywhere.

Update: It turns out there's a tiny tunnel from the air vent we saw in Step 3, passing through the chassis and right into the path of this little sensor. So it probably doesn't need any help from the speaker grille, but we still think it's most likely a barometer.

The Apple Watch is a Lead I ECG, which means it's only measuring voltage between the right and left arms. The first electrode is on the Watch back, pressed against your wrist. The second is the crown, held by your opposite hand's fingers.

These electrodes detect tiny changes in electrical polarization across your skin as your heart beats. The S4 then interprets that data to compute and analyze your heart rhythm.

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The original Apple Watch was revolutionary upon its release, but the yearly updates have been mostly minor—until now.

Where the first Watch was awkwardly layered together and used too much glue, the Series 4 feels much more thoughtfully laid out.

Apple pundit John Gruber has compared this to the leap in design brought by the iPhone 4, and we might even go a bit further and call it an iPhone 5: a device that knows its priorities, and wants to look as elegant inside as out.

Besides the sensors attached to the bottom cover, it doesn’t look like you can get to the battery and other components from that side. The S4 blocks everything and it’s much too large to remove from the bottom out. Much of the screw heads are also facing away from the bottom side.